Improved brick



JOHN GRIMMVOFHCUYAHOG FALLS, OHIO.

' Letters Patent No. 86,664, dated Februar/ry 9, 1869.

IMPROVED BRICK.

The Schedule referxei to in these Letters Patent and making part of the same.

To all whom it may conce/m:

Be it known that I, JOHN GRIMM, of Cuyahoga Falls, in the county of Summit', and State of Ohio, have invented certain new and useful- Improvements in Making Bricks, as a new article of manufacture and I do hereby declare' that the following is a full and complete description of the same, reference being had to the accompanying drawings, making part of `this specication, in which- Figure l is a perspective View of the brick. i Figure 2, an end view. Figure 3, aview of a brick intended for corner-work. Like letters referto like parts inthe different views presented.

This invention relates to the construction of hollow bricks, by forming within said bricks a series of airchambers and supporting-arches, whereby the brick is capable of resisting a greater incumbent weight, in proportion to the amount of clay, than a longitudinally-perforated brick, with a single or a series of round perforations for the retention' of dead air, whereby the4 walls composed of saidbricks are less liable to become 4 damp than walls built up in the ordinary way with solid ones.

The drawing, Ifig. l, represents a brick having the usual external shape and size, but which, however, may be constructed in larger blocks, if so desired. For ordinary use, it is proposed to make them of much larger size than the common brick, the peculiar construction being such that they cannot be crushed by the weight of the superimposed wall.

It will be observed that each of the four sides of the brick, as the arches, by their mutual relation to each other, and supported by their central core and wall E, combine the greatest pqssible strength with lightness of structure and the smallest amount of material.

These perforations also provide a large amount of room forthe retention of dead air.

lIhe tubular air-chambers, or interstices, twelve in number, though thus numerous, in no way lessen the strength of the brick, which is found, by practical test, to be stronger than those that are solid.

Also, byithus providing so large a space for the retention of air, the bricks are more thoroughly and evenly burned, as the heat, in burning, can readily Vpass through .theinterior, and thereby burn them to amore uniform temperor hardness without reducing their strength.

Fig. 3 shows a brick for building up the corners of the work, and which is also constructed with the same arrangement ofperforations and arches as above de scribed.

I am aware that hollow bricks, or bricks with a single longitudinal perforation, have been made; such construction I do not claim. I am also aware that bricks have been perforated, Yboth horizontally and perpendicularly, as ordinarily laid; suc-h brick I do not claim. Nor do I claim simply alongitudinally-perforated brick, with a series of perfor-ations, as I wish to limit myself to the special arrangement of perforations shown in my brick, which gives greaterstrength, in proportion to the amount of material, and, for the same size, a much lighter brick.

Having thus described my invention,

What I claim, and desire to secure by Letters Patent, is Y Y The arrangement of the perforations with .relation to the arches A B, walls C, `core D, and the exterior of the brick, in the manner and for the purpose as set forth. i

J OBEN GRIMM.-

Witnesses:

WILLIAM A. TAYLOR, E.- L. BABcocK. 

